Meet the Faculty

The faculty of the Natural Sciences Department teach the Biology-Health Sciences and Environmental Sciences Programs, as well as "service" courses that are needed for many other degree programs at Oregon Tech.

Department Chair Dr. Ken Usher
 Associate Department Chair  Lloyd Parratt
Program Directors
Biology-Health Sciences Dr. Hui-Yun Li
Environmental Sciences Dr. Jherime Kellermann
Advising Coordinators
Biology-Health Sciences Rose McClure
Biology minor  Lloyd Parratt
Environmental Sciences Dr. Jherime Kellermann
Dr. Seth Anthony

Dr. Seth Anthony, Associate Professor


I teach general chemistry and electrochemistry for engineering students, but I also advise students and teach in the Environmental Sciences program! I'm also involved in research on chemistry education and development of new inquiry-based laboratory experiments.

Dr. Addie Clark

Dr. Addie Clark, Assistant Professor

 DOW 201
I teach introductory chemistry.  I also have interests in environmental and analytical chemistry.
Tricia Elliott

Tricia Elliott, Instructor

 DOW 203

I teach field biology and Environmental Sciences classes.

Kerry Farris

Kerry Farris, Instructor

 DOW 223

I teach field biology and Environmental Sciences classes.

Dr. Kamal Gandhi

Dr. Kamal Gandhi, Assistant Professor

 DOW 221

I enjoy teaching medical microbiology and molecular biology.

Dr. Chelsea Gustafson

Dr. Chelsea Gustafson, Assistant Professor

I teach chemistry in Portland-Metro, including general chemistry for engineers and medical lab science students, as well as organic and biochemistry for medical lab science students.
Dr. Jherime Kellermann

Dr. Jherime Kellermann, Associate Professor, Program Director Environmental Science

 DOW 208

I teach courses in biology and wildlife ecology. I am especially interested in student projects in wildlife, habitat ecology, and issues related to wildlife management and conservation.  I am the Program Director and Advising Coordinator of the Environmental Sciences major.

Dr. Jesse Kinder

Dr. Jesse Kinder, Assistant Professor

I teach physics for students in a variety of majors, including engineers, biologists, and health science professionals.
Dr. Hui-Yun Li

Dr. Hui-Yun Li, Professor, Program Director Biology-Health Sciences

 DOW 204

I teach Human Anatomy and Physiology, Biopsychology, Cell Biology and Introduction to Neuroscience. I am Program Director of the Biology-Health Sciences major.

Dr. Travis Lund

Dr. Travis Lund, Associate Professor


I teach organic chemistry, genetics, and a few other biology and chemistry courses. I also mentor student projects in the field of STEM Education Research (contact me if you are interested!).


Rose McClure

Rose McClure, Professor


I teach elementary chemistry, anatomy & physiology, and medical laboratory science courses.  I am the Advising Coordinator for Biology-Health Sciences, and advise students in the pre-Medical Laboratory Science and pre-paramedic programs.

Dr. Tanya McVay

Dr. Tanya McVay, Professor

 DOW 240

I teach Human Anatomy & Physiology, Cardiovascular Physiology, and Physics of Ultrasound.

Dr. David Johnston

Dr. David Johnston, Instructor

I am the contact for information about the Applied Physics Minor for the Portland-Metro Campus.  I teach PHY 221, PHY 222, PHY 223, and PHY 311 (General Physics with Calculus and Introduction to Modern Physics).

Dr. Greg Pak

Dr. Greg Pak, Associate Professor

I teach Anatomy & Physiology, Medical Terminology, Pathophysiology, Introduction to Medical Imaging and Immunology on the Portland-Metro Campus. I advise all of Pre-MIT and some of Biology-Health Sciences students in Wilsonville. I am also the contact person related to Biomedical Engineering.

Lloyd "Smitty" Parratt

Lloyd "Smitty" Parratt, Associate Professor; Associate Department Chair

 DOW 224

I teach Introduction to Human Anatomy & Physiology, Introduction to Environmental Science, Ecoregional Studies, Human Anatomy & Physiology laboratories, Medical Terminology, Tai Chi and Qigong for Health, Wilderness Navigation and Relaxation and Flexibility.

Dr. John Ritter

Dr. John Ritter, Professor


I am a member of the Geomatics department, but I also teach and advise students in the Environmental Sciences program.

Vira Schechtel

Vira Schechtel, Professor


I teach general chemistry for engineering and biology students. I am the faculty advisor to Oregon Tech's International Student Club.

Tom Taylor

Tom Taylor, Assistant Professor

I teach Anatomy & Physiology labs for students in the Biology-Health Sciences major, as well as pathophysiology and medical terminology. I am our department's cadaver coordinator.  Before I came to Oregon Tech I was a practicing physician assistant.

Dr. Ken Usher

Dr. Ken Usher, Professor, Chair of Natural Sciences Dept

I teach biochemistry and pharmacology.  Sometimes I mentor student research projects in biochemistry too, so if you're interested in that, contact me.
Christy VanRooyen

Christy VanRooyen, Assistant Professor

 DOW 206

I teach elementary chemistry, introductory biology, and Environmental Data Analysis.

Dr. Robyn Wilde

Dr. Robyn Wilde, Professor


I teach physics to a wide range of students, including biology students.

Dr. Yue-Hai (John) Yang

Dr. Yue-Hai (John) Yang, Assistant Professor


I teach physics for students in a variety of majors, including engineers, biologists, and health science professionals.

Chris Wayne

Chris Wayne

Chris is adjunct faculty and is also the GIS coordinator and Geographer at Crater Lake National Park.